U.S. Department of Transportation
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC 20590
202-366-4000
Federal Highway Administration Research and Technology
Coordinating, Developing, and Delivering Highway Transportation Innovations
| REPORT |
| This report is an archived publication and may contain dated technical, contact, and link information |
|
 |
| Publication Number: FHWA-RD-01-113 Date: October 2002 |
Publication Number: FHWA-RD-01-113 Date: October 2002 |
Figure 32. Flow chart for the deflection basin and load-response characterization procedure
1. Read deflection data file. Go to Number 2
2. Is Deflection i> Deflection 1? If Yes, it is Type I; go to Number 10. If no, go to Number 3.
3. Is Deflection data i> Deflection data i-1? If Yes, it is Type III; go to Number 10. If no, go to Number 4.
4. Calculate Deflection i/Deflection 1. Go to Number 5.
5. Calculate slope between normalized deflections. Go to Number 6.
6. Is slope i > slope i+1 and slope i+1 < i+2 and slope i+2 > slope i+3? If yes, it is Type II; go to Number 10. If no, go to Number 7.
7. Is slope i < slope i+1 and slope i+1 > i+2 and slope i+2 < slope i+3? If yes, it is Type II; go to Number 10. If no, go to Number 8.
8. Is slope i <= 4slope i+1? If yes, it is Type II; go to Number 10. If no, go to Number 9.
9. Is slope i <= 0.15slope i+1? If yes, it is Type II; go to Number 10. If no, it is Typical; go to Number 10.
10. Perform regression between load and sensor 1 deflections. Go to Number 11.
11. Is R squared >= 0.99? If yes, go to Number 15. If no, go to Number 12.
12. Perform linear regression for two highest load levels. Go to Number 13.
13. Is -20mu <= intercept <= 20mu? If yes, it is Elastic. If no, go to Number 14.
14. Is intercept > 20 mu? If yes, it is Strain Hardening. If no, it is Strain Softening.
15. Is -10mu <= intercept <= 10 mu? If yes, it is Linear Elastic. If no, go to Number 16.
16. Is intercept > 10mu? If yes, it is Strain Hardening. If no, it is Strain Softening.
